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Quasi-steady aero-acoustic model of a T-junction based on steady state CFD simulations: Influence of turbulence model.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2014 (English)In: Proceedings of Forum Acusticum, European Acoustics Association (EAA), 2014Conference paper (Refereed)Text
Abstract [en]

The aero-acoustic response of a T-junction subjected to different combinations of grazing and bias flow is well represented by a quasi-steady model based on incompressible pressure loss coefficients. The pressure loss coefficients are readily available for many geometries in standard handbooks, but could also be determined experimentally or by computational fluid dynamics. In this study the choice of turbulence model in the simulations is discussed. Three common models: k-ε, k-ω and k-ω SST, are tested against handbook data. Results for the pressure loss coefficients are presented as well as the derived acoustic results. Although rather poor agreement between the simulations and handbook data for the pressure loss coefficient the derived acoustic results are of sufficient quality for practical engineering use.

Place, publisher, year, edition, pages
European Acoustics Association (EAA), 2014.
Keyword [en]
Aeroacoustics, Handbooks, Intersections, Turbulence models, CFD simulations, Common models, Practical engineering, Pressure loss coefficient, Quasi-steady model, Steady state, T junctions, Computational fluid dynamics
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-181673ScopusID: 2-s2.0-84953273677ISBN: 9788361402282OAI: oai:DiVA.org:kth-181673DiVA: diva2:910591
Conference
7th Forum Acusticum, FA 2014, 7 September 2014 through 12 September 2014
Note

QC 20160309

Available from: 2016-03-09 Created: 2016-02-02 Last updated: 2016-03-09Bibliographically approved

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Karlsson, Mikael
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